Ok. So I have my engine out and decided to take one head off and check some things out. Everything looked great!
While the one head was off I checked valve lash on the opposite side. It was about .012".
When I put the other head back on and the valve train back together it went back to around .006".
I adjusted all the valves to the .006" @ TDC, but noticed the valve lash will become larger (up to .009") when I check it at different spots through out the cam rotation.
It seems to be related to the load from the valve springs on the opposite side of the cam from where I am measuring.
Is this normal? Is this because of worn cam bearings? Something else?
Any thoughts would be great.
Thanks, Dave
Hey, thanks.
All the valves were adjusted from TDC of that cylinder.
My problem is that @ TDC for the cylinder the valve lash is .006, then if I rotate the engine 60-80 degres the lash will go to .009 or something. I do not think this is normal (or is it?).
I am trying to chase down a engine noise that I think is valve train related. Kinda loud tapping. I have heard of a few people with this noise- http://forums.pelicanparts.com/showthread.php?s=&threadid=106485&perpage=20&pagenumber=2
Any Ideas??
Thanks, Dave
Are you sure the engine is at TDC ?? Are you checking at the piston or on the rotor/cap ?? The dizzy will be 27deg. off.
B
Checking the engine for TDC, not the dizzy.
There's around 200 degres cam rotation where the cam is flat, right? Well my lash will change (gets larger) as I rotate the engine. I'm pretty sure this is related to the load on the opposite side of the cam from the valve springs??
NORMAL???
Thanks,
It’s normal, You have to much time on your hands! LOL
The cams go bad on the lobes, if your 1800 has good power (for a 1800) the cam is ok. High mileage or poor power engines, even after a head job, means the cam maybe worn out.
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